Does bubble has this feature?

I want user to register on mydomain where each user will tied to specific subdomain

for example: main domain is
subdomain is;;

so a user will register themself at but then their user will tied to or with a specific code for each subdomain?

let say reference no is 111; reference no is 222
so when a user register using the reference no 111 their user will tied to .
Does bubble has this feature?, If yes, please how to do it?

Bubble hasn’t such a feature, but search for “TheirLabel” on this forum, I guess this could help achieving what you need

maybe this link can help you.